Mr. Heater MH9B Operating Instruction
Operational Instructions Only - No Parts List
OPERATING INSTRUCTIONS
Model #
MH9B
AND OWNER’S MANUAL
READ INSTRUCTIONS CAREFULLY: Read and follow all instructions. Place instructions in a safe
place for future reference. Do not allow anyone who has not read these instructions to assemble,
light, adjust or operate the heater.
!
DANGER:
For Canada Sale
CARBON MONOXIDE HAZARD
This appliance can produce carbon
monoxide which has no odor.
Using it in an enclosed space can kill you.
Never use this appliance in an enclosed
space such as a camper, tent, car or
home.
PORTABLE PROPANE HEATER FOR OUTDOOR RECREATIONAL USE ONLY
FOR YOUR SAFETY
If you smell gas:
1. Do not attempt to light appliance.
2. Extinguish any open ame.
3. Disconnect from fuel supply.
FOR YOUR SAFETY
Do not store or use gasoline or other ammable
vapors and liquids in the vicinity of this or any
other appliance.
03/08 73483CAN Rev. BENERCO GROUP INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 • 216-881-5500
WARNING:
Every time hose or tank is connected to unit, connection
must be checked for leaks in one or more ways: Apply
soapy water to connection, look for bubbles, listen for
hiss of escaping gas, feel for extreme cold, smell for rotten egg odor. Do not use if leaking!
WARNING:
Any changes to this heater or its controls can be
dangerous.
WARNING:
Early signs of carbon monoxide poisoning resemble the
u, with headache, dizziness and/or nausea. If you have
these signs, heater may not be working properly. Get
fresh air at once! Have heater serviced.
THE STATE OF CALIFORNIA REQUIRES THE
FOLLOWING WARNING:
WARNING:
Combustion by-products produced when using this product
contain carbon monoxide, a chemical known to the State
of California to cause cancer and birth defects (or other
reproductive harm).
CONTENTS
General Safety Instructions ............................................... 3
General Information .......................................................... 3
Operating with Disposable Propane Cylinders
Operating With Hose Connected to Remote Cylinder
Maintenance.....................................................................5
Troubleshooting ................................................................ 6
Parts List
Parts Ordering Information ............................................... 8
Service Information
........................................................................... 6
...........................................................8
...................4
........ 4
SPECIFICATIONS
MODEL NO. ...................................................... MH9B
GAS TYPE ......................................................PROPANE
INPUT BTU/HR. .......................................4,000 / 9,000
CLEARANCE TO COMBUSTIBLES
TOP ....................................................................... 30”
FRONT ....................................................................24”
SIDES ......................................................................6”
REAR ....................................................................... 0”
Mr. Heater | Portable Buddy Operating Instructions and Owner’s Manual
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GENERAL SAFETY INSTRUCTIONS
THIS IS A HEATING APPLIANCE. DO NOT OPERATE
THIS APPLIANCE WITHOUT THE FRONT WIRE GUARD
INSTALLED
• Due to high temperatures, the appliance should be
located out of trafc and away from combustible materi-
als.
• Children and adults should be alerted to the hazard of
high surface temperatures and should stay away to avoid
burns or clothing ignition.
• Young children should be carefully supervised when they
are near the appliance.
• Do not place clothing or other ammable material on or
near the appliance.
• Do not operate heater in any moving vehicle.
• This heater is for outdoor use only.
• GAS PRESSURE AT HEATER IS REGULATED AND FIXED
AT 11” W.C. WHEN USING A REMOTE HOSE CONNECTION DO NOT REGULATE OR REDUCE PROPANE TANK
SUPPLY PRESSURE TO HEATER!
• REGULATOR IN HEATER MUST ALWAYS BE IN PLACE
DURING OPERATION.
• Any safety screen or guard removed for servicing the ap-
pliance must be replaced prior to operating the heater.
• The appliance should be inspected before each use.
Frequent cleaning may be required. The control compartments, burner and circulating air passageways of
the appliance must be kept clean, see MAINTENANCE.
• DO NOT use this heater if any part has been under
water. Immediately call a qualied service technician to
inspect the heater and to replace any part of the control
system and any gas control, which has been under water.
• When used without adequate combustion and ventila-
tion air, this heater may give off excessive CARBON
MONOXIDE, an odorless, poisonous gas.
• Some people - pregnant women, persons with heart
or lung disease, anemia, those under the inuence of
alcohol, those at high altitudes - are more affected by
carbon monoxide than others.
• When heater is placed on the ground, make sure the
ground is level and keep any objects at least 24 inches
from the front of the heater. THIS HEATER IS EQUIPPED
WITH A TIP OVER SWITCH THAT WILL SHUT THE HEATER OFF IF THE HEATER TIPS OVER HOWEVER, DO NOT
LEAVE HEATER UNATTENDED OR WHERE CHILDREN
MAY CAUSE THE HEATER TO TIP OVER. NEVER OPERATE
THE HEATER WHILE SLEEPING!
GENERAL INFORMATION:
• When the heater is cold, it will take a few minutes for
the burner tile to turn bright orange. This is normal and
the heater is working properly. If burner tile is visibly
aming, turn heater off and call a qualied service technician.
• When the unit is lit, there should be about a quarter
inch border around the tile that will not turn bright
orange. This is normal.
• When operating the heater for the rst time, the top
area of the reector may discolor. This is also normal
and is no reason for concern.
• Designed to operate at altitudes up to 7,000 feet. When
operating the heater at altitudes over 7,000 FT. above
sea level, the unit may not burn as bright as in lower
altitudes. This is normal. At higher altitudes, the heater
may shut-off. If this happens, provide fresh air, wait 5
minutes and re-light. If the heater continues to shut
off, there may not be enough oxygen available to feed
proper combustion.
• Operating time will vary depending on the heater set-
ting and the supply cylinder size. 3 to 6 hours on a 1 lb.
cylinder. 48 to 110 hours on a 20 lb. cylinder (based on
“HI” and “LO” settings).
• When moving heater when lit or bumping heater setting
it down, tip over switch may shut off heater. If this happens, re-light.
Mr. Heater | Portable Buddy Operating Instructions and Owner’s Manual 03/08 73483CAN Rev. B
3
LIGHTING / OPERATING
INSTRUCTIONS FOR USE WITH
DISPOSABLE 1 LB. PROPANE
CYLINDERS:
WARNING: Always inspect propane cylinder and heater propane
connections for damage, dirt, and debris before attaching
propane cylinder. Do not use if head of cylinder is damaged,
punctured or deteriorated.
ALWAYS ATTACH OR DETACH CYLINDER OUTDOORS AWAY
FROM FLAMES, OTHER IGNITION SOURCES, AND ONLY WHEN
HEATER IS COOL TO TOUCH. NEVER SMOKE WHEN ATTACHING
OR REMOVING PROPANE CYLINDER OR MAKING REMOTE
CONNECTIONS!
• Use only LP-gas cylinders marked in accordance with the
U.S. Dept. of Transportation (DOT).
• Use only 16.4 oz. (1 lb.) disposable cylinders that mate
with No. 600 valve connection.
• Heater and attached cylinder must be in an upright posi-
tion during operation.
• Make sure four-position Control Knob is in “OFF” posi-
tion; see Figure 1.
Figure1
• Screw 1 lb. disposable LP-gas supply cylinder clockwise
(from bottom) into portable heater until hand-tight.
• Check cylinder connection for leaks with soapy water at
the threaded connection under the domed plastic cover
where the cylinder screws into the regulator. SEE WARNING! ON PLASTIC COVER.
• Depress and turn Control Knob counterclockwise to
“PILOT” position and hold for 30-60 seconds.
• Depress red spark ignition button to light pilot ame
(repeat until pilot lights) and continue to hold Control
Knob down and at “PILOT” position for 30-60 seconds
to enable Pilot Light Safety System.
• After lighting pilot, release knob. Knob should return
to fully extended position. To operate heater slightly
depress knob and gently turn to lock in desired position.
• Fully turn Control Knob to “HI” position to light burner
tile. Leave on “HI” position until burner tile turns bright
orange.
• After burner tile has turned bright orange, adjust heat
output by turning Control Knob to desired position
(“LO” ot “HI” setting)
Warning:
DO NOT OPERATE HEATER UNLESS CONTROL KNOB
IS LOCKED IN A POSITION MARKED “HI”, “LO” OR
“PILOT”. NEVER SET CONTROL KNOB BETWEEN LOCKED
POSITIONS. POOR COMBUSTION AND HIGHER LEVELS
OF CARBON MONOXIDE MAY RESULT.
• To shut off heater, slightly push down and turn Control
Knob clockwise to “OFF” position.
• CAUTION: After turning heater off, wire guard will
remain hot. Allow to thoroughly cool before storing.
• Do not operate, store or remove cylinder near am-
mable items or ignition sources.
• LP-GAS CYLINDERS MUST BE DISCONNECTED FROM
HEATER WHEN NOT IN USE!
LIGHTING / OPERATING
INSTRUCTIONS FOR USE WITH HOSE
CONNECTED TO A REMOTE CYLINDER,
MAXIMUM SIZE 20 LBS:
• This heater may be used with a remote rellable pro-
pane cylinder ONLY when the cylinder and heater are
located outdoors and the heater is used with Mr. Heater
Hose No. F273701or F273702 and fuel lter F273699. Fuel
lter must be replaced annually. Or use F273704 Buddy
series hose. Fuel not required.
• DANGER: NEVER bring a rellable propane cylinder
indoors. A re or explosion can occur causing property
damage, serious injury or death!
• Inspect the hose before each use of the heater. If there
is excessive abrasion or wear, or the hose is cut, replace
prior to using the heater with one of the Mr. Heater
Hose No’s. shown above.
• The propane cylinder must include a listed overlling
protection device as well as a collar to protect the cylinder valve.
• Heater must be in an upright position during operation.
• Make sure four-position Control Knob is in “OFF” posi-
tion; see Figure 1, at left.
• Screw hose connector into regulator on heater and
screw connector on other end of hose into LP-gas supply
cylinder valve. Tighten all hose connections.
• Open valve at LP-gas supply cylinder.
• Check all hose connections for leaks with soapy water at
the threaded connection under the domed plastic cover
where the hose connector screws into the regulator and
at LP-gas supply cylinder. SEE WARNING! ON PLASTIC
COVER.
Mr. Heater | Portable Buddy Operating Instructions and Owner’s Manual
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• Depress and turn Control Knob counterclockwise to “PI-
LOT” position and hold for 1 - 2 minutes. This may take
longer to purge air from the supply hose depending on
the length of the hose being used.
• Depress red spark ignition button to light pilot ame
(repeat until pilot lights) and continue to hold Control
Knob down and at “PILOT” position for 30-60 seconds
to enable Pilot Light Safety System.
• After lighting pilot, release knob. Knob should return
to fully extended position. To operate heater slightly
depress knob and gently turn to lock in desired position.
• Fully turn Control Knob to “HI” position to light burner
tile. Leave on “HI” position until burner tile turns bright
orange.
• After burner tile has turned bright orange, adjust heat
output by turning Control Knob to desired position
(“LO” or “HI” setting)
Caution: Do not try to adjust heating levles by using the
propane tank shut off valve.
Warning:
DO NOT OPERATE HEATER UNLESS CONTROL KNOB
IS LOCKED IN A POSITION MARKED “HI”, “LO” OR
“PILOT”. NEVER SET CONTROL KNOB BETWEEN LOCKED
POSITIONS. POOR COMBUSTION AND HIGHER LEVELS
OF CARBON MONOXIDE MAY RESULT.
• To shut off heater, shut off propane at supply tank, al-
low heater to use-up propane in supply line until heater
shuts off, then slightly push down and turn Control
Knob clockwise to “OFF” position.
• CAUTION: After turning heater off, wire guard will
remain hot. Allow to thoroughly cool before storing.
• When not in use, the gas must be turned off at the
LP-gas supply cylinder. When the LP-gas supply cylinder
is not disconnected from the heater, the heater and the
cylinder must be stored outdoors, in a well ventilated
space, out of reach of children, and must not be stored
in a building, garage or any other enclosed area.
• Indoor storage of the heater is permissible only if the
cylinder is disconnected and removed from the heater.
Cylinders must be stored outdoors out of the reach of
children and must not be stored in a building, garage or
any other enclosed area.
MAINTENANCE:
Always keep the heater area clear and free from combustible
materials, gasoline and other ammable vapors and liquids.
Keep the vent areas (slots in the bottom and the top at the front
of heater) clear at all times.
Visually inspect the pilot ame and burner periodically during use.
The pilot ame should be blue in color (not yellow) and will
extend beyond the thermocouple. The ame will surround the
thermocouple just below the tip, see Figure 2, below. A slight
yellow ame may occur where the pilot ame and main burner
ame meet. The burner should be bright orange (with a slight
blue color around the border, a red-orange haze that is visible on
the ceramic tile is acceptable) and without a noticeable ame.
A blue ame that rolls out at the top of the ceramic tile indicates
an accumulation of dust, lint or spider webs inside the casing
assembly and main burner assembly. If the pilot is yellow or the
burner has a noticeable ame, cleaning may be required.
Use the following procedure to inspect the casing assembly and
main burner assembly.
Figure 2
It is necessary to periodically check the burner orice and burner
venturi tube to make sure they are clear of insects/nests or spider
webs that may accumulate over time. A clogged tube can lead to
a re.
1 Allow heater to thoroughly cool before performing any
maintenance.
2 Remove disposable 1 lb. cylinder from heater or turn
OFF gas supply at remote cylinder valve, and disconnect
hose from heater.
3 Remove wire guard from front of heater by gently bend-
ing to remove from holes in front cover.
4 Remove (1) burner assembly retaining screw from bot-
tom of the heater.
5 Pull burner assembly from front of the heater.
6 Inspect interior of casing assembly for accumulation
of dust, lint or spider webs. If necessary, clean interior
of casing assembly with a vacuum cleaner or apply air
pressure. Do not damage any components within casing
assembly when you are cleaning.
7 Inspect and clean main burner orice (mounted to pilot
bracket with jam nut) by using a vacuum or apply air
pressure at orice opening.
8 Inspect and clean pilot (mounted to bracket) by using a
vacuum or apply air pressure through the holes in the
pilot indicated by the arrows in Figure 2, above.
WARNING: Never use needles, wires, or similar cylin-
drical objects to clean the pilot to avoid damaging the
calibrated ruby that controls the gas ow.
Mr. Heater | Portable Buddy Operating Instructions and Owner’s Manual 03/08 73483CAN Rev. B
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